vue-cli 设置跨域代理 线上地址报404

Question

1. vue-cli 设置跨域代理，本地正常访问，线上地址报404。这是什么原因？

vue-cli中跨域代理设置：

module.exports = {
  dev: {
    // Paths
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {
      '/api': {
        target: 'https://xxx.xxx-xxx.com',
        changeOrigin: true,
        pathRewrite: {
          '^/api': ''
        }
      }
    },

    // Various Dev Server settings
    host: ip(), // can be overwritten by process.env.HOST
    port: 9999, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: false,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    // Use Eslint Loader?
    // If true, your code will be linted during bundling and
    // linting errors and warnings will be shown in the console.
    useEslint: true,
    // If true, eslint errors and warnings will also be shown in the error overlay
    // in the browser.
    showEslintErrorsInOverlay: false,

    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'eval-source-map',

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,

    // CSS Sourcemaps off by default because relative paths are "buggy"
    // with this option, according to the CSS-Loader README
    // (https://github.com/webpack/css-loader#sourcemaps)
    // In our experience, they generally work as expected,
    // just be aware of this issue when enabling this option.
    cssSourceMap: false,
  },

  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: './',

    /**
     * Source Maps
     */

    productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  }
}

utils.js 文件中的请求地址设置:

function network (path, flag) {
  if (flag) {
    return `api/${path}`
  }
  return `api/api/${path}`
}

本地请求正常，线上请求会报404 的错误，线上报错图片：

Answer 1

这本来就是开发环境下的跨域代理，线上环境又不起作用。可以使用nginx，或者后台接口设置cors

Answer 2

开发环境能够使用代理是因为启动了开发服务器，能够把请求转发到接口，
线上是打包成html部署，你的静态站点不会转发请求，线上可以用nginx做下代理

Answer 3

跨域？直接axios啊